Removing tooth restorations



Mal ch 15, 1949. s. BORDER 2,464,289 I REMOVING TOOTH RESTORATIONS Filed Jan. 15, 1945 Inventor A n/2115215. 507 4 67.

Patented Mar. 15, 1949 UNITED STATES PATENT OFFICE REMOVING TOOTH RESTORATION S Samuel L. Border, Monon, Ind.

Application January 15, 1945, Serial No. 572,784

2 Claims. 1

This invention relates to an improved method of and means for removing gold inlays, crowns and bridges.

The primary object of the invention is to provide an improved method and means of the above kind whereby the gold restoration may be removed with ease and in such a manner as to avoid damaging either the restoration or the tooth structure carrying the same.

The present invention consists in the novel method and means hereinafter more fully described, illustrated by the accompanying drawings and claimed.

In the drawings wherein like reference characters indicate corresponding parts throughout the several views:

Figure 1 is an enlarged fragmentary elevational view, showing a restoration-removing means constructed in accordance with the present invention and as it appears in use in removing a gold crown from a tooth structure.

Figure 2 is an elevational view of the jack screw forming part of the means shown in Figure 1.

Figure 3 is a bottom plan view of the removable knob which is employed with the screw of Figure 2, to provide the means shown in Figure 1.

Referring in detail to the drawings, 5 indicates a tooth structure having a gold crown 6 thereon.

In removing a gold tooth restoration, such as the crown 6, I form such restoration with a substantially central, vertical opening entirely therethrough, as indicated at B, and by means of a suitable drill. I then thread a jack screw I into and through the opening 5' until its lower end impinges the adjacent outer end of the tooth structure 5. The threads of the screw 1 are preferably fine and of such material as to cut their own threads in the restoration 6 when screwed into the latter. By slowly turning the screw 1 after it impinges the end of the tooth structure 5, the restoration 6 is gradually jacked loose from the tooth structure for convenient removal from the latter. In order to avoid damage to the tooth structure, the screw 1 is provided with a relatively broad, flat end 8 to impinge the end of the tooth structure. It will be noted that the present method is specifically designed for use in connection with relatively thick restorations having a carved occlusal. The carved occlusal has the thickness of the enamel of a tooth, which is suflicient for proper threading and removal with the screw I.

To facilitate manual rotation of the screw I in removing the gold restoration, I preferably provide the screw 1 with a removable knob 9 consisting of a circular body of metal having a knurled periphery and provided with a central polygonal opening IQ of a form and size corresponding to the tapered polygonal head H of the screw 1. With the use of this knob, the screw may be readily and effectively turned in the mouth by grasping the knob with the thumb and fore finger, and the knob may be readily removed when the restoration has been jacked loose, for removal with the screw.

In actual practice, it has been found that by use of the present method and means, various gold restorations of the carved occlusal type may be easily and expeditiously removed without damaging either the restoration or the tooth structure.

What I claim is:

l. The herein described method of removing from a tooth structure a gold restoration of the carved occlusal surface type having a relatively thick occlusal surface, which consists in forming a substantially central opening through the occlusal surface, threading a screw into and through said opening so as to cut a thread in the wall of the opening and bring the end of the screw against the tooth structure, and continuing such threading of the screw through the occlusal surface so as to jack the restoration from the tooth structure.

2. The herein described method of removing from a tooth structure a gold restoration having a relatively thick occlusal surface, which consists in forming a substantially central opening through the occlusal surface, threading a jack screw with a broad fiat end into and through said opening so as to cut a thread in the wall of the opening and bring the broad flat end of the screw into engagement with the tooth structure, manually imparting turning movement to the screw by application of power thereto through the medium of a thumb and finger of a hand within the mouth, and continuing threading of the screw through the occlusal surface until the restoration is jacked loose from the tooth structure.

SAMUEL L. BORDER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 403,293 Rosenthal May 14, 1889 1,041,098 Kenny Oct. 15, 1912 1,109,096 West Sept. 1, 1914 

